Table 1. Off-the-shelf CNN architectures used in the surveyed literature, and the number of articles using them.

This is indicative only, since not all articles clearly state whether an off-the-shelf model is used, some articles use modified/derived versions, and some use multiple architectures.

CNN architecture	Num articles
ResNet (He et al., 2016)	23
VGG (Simonyan & Zisserman, 2014) or VGGish (Hershey et al., 2017)	17
DenseNet (Huang, Liu & Weinberger, 2016)	7
AlexNet (Krizhevsky, Sutskever & Hinton, 2012)	5
Inception (Szegedy et al., 2014)	4
LeNet (LeCun et al., 1998)	3
MobileNet (Sandler et al., 2018)	2
EfficientNet (Tan & Le, 2019)	2
Xception (Chollet, 2017)	2
U-net (Ronneberger, Fischer & Brox, 2015)	2
bulbul (Grill & Schlüter, 2017)	2
Self-designed CNN	19